AI Document Intelligence

AI Document Intelligence is a set of features that analyze your documents and help you discover connections you might have missed. These features complement wikilinks by finding related content automatically.

All features are accessible from the Related tab in the right panel or as inline suggestions in the editor.

The Related tab shows documents that are similar to the one you are currently editing. Unmarkdown uses two methods to find related content:

• Keyword matching (all users): compares document titles and extracts top keywords from content to find overlap
• AI-powered semantic search (Pro or BYOK): uses OpenAI embeddings to find documents with similar meaning, even when they use different words

Semantic search requires either a Pro subscription with server-side keys or your own OpenAI API key added in Settings > AI. Without an API key, the keyword fallback still provides useful results.

The Related tab also scans the current document for references to other document titles that are not wrapped in [[wikilinks]]. These are called unlinked mentions.

For example, if you have a document called "API Design" and the current document contains the text "our API design process", Unmarkdown detects that "API Design" matches a document title and offers to convert it into a wikilink.

• Click "Link" next to a mention to wrap it in [[brackets]]
• Click "Link all" to convert every occurrence at once
• Mentions inside code blocks, URLs, and existing wikilinks are excluded
• Titles shorter than 3 characters are skipped to avoid false matches

Unlinked mentions run entirely in your browser. No API key or network request is required. This feature is available on all plans.

As you type in the markdown editor, Unmarkdown watches for phrases that match the titles of other documents. When a match is found, a small chip appears inline suggesting you link to that document.

• Press Tab or click the chip to accept the suggestion and wrap the text in [[brackets]]
• Press Escape to dismiss the suggestion
• Suggestions dismiss automatically after 3 seconds if not acted on
• Suggestions appear after a 500ms pause in typing to avoid distraction

Auto-suggest runs client-side with no API cost. You can enable or disable it from Settings > AI > Auto-suggest links. It is enabled by default.

Hover over a wikilink in the preview pane to see an AI-generated summary of the linked document. The summary appears in a floating card after a short delay and gives you a quick preview of the document's content without opening it.

Hover summaries are generated by Claude Haiku (or GPT-4o-mini via BYOK). They require either a Pro subscription or your own API key. Results are cached in your browser so the same wikilink does not trigger repeated API calls.

Summary of which features are available on each plan:

• Unlinked mentions: Free and Pro (client-side, no API key needed)
• Auto-suggest links: Free and Pro (client-side, no API key needed)
• Related documents (keyword): Free and Pro
• Related documents (semantic): Pro or BYOK
• AI hover summaries: Pro or BYOK (opt-in)

See AI Keys for instructions on adding your own API keys.

Unlinked mentions and auto-suggest run entirely in your browser. No document content is sent to any server for these features.

Related documents (semantic mode) and hover summaries send content to the AI provider (OpenAI for embeddings, Anthropic or OpenAI for summaries). When using BYOK, your content is sent directly to the provider under your own API key and terms. The AI providers do not store your content after processing.